【摘要】 计算了多种四点剪切Ⅱ型裂纹试件的全场应力，并同时进行了实验研究。通过对这些试件的计算结果与实验结果的比较分析，较好地揭示了这些Ⅱ型裂纹试件初裂、后继破坏以及“剪切核”的形成机理，避免了目前仅用Ⅱ型裂纹奇异应力场给分析带来的误差及局限。更多还原

【Abstract】 Testing study and stress distribution calculation of several kinds of four-pointshearing specimen are carried out. The mechanism of initial fracture, post failure and’shearing core’ are revealed better through the analysis comparision between calculationand experiment. The limitation and errors of analysis on model Ⅱ crack problem only withsingular stress field are avoided.更多还原